ABS Problems My ABS light and Brake light are on and the Speedo works intermittantly, above 30 miles an hour. What would be the most likely culprit? Powertrain Control Module or the Speed sensor?? The ABS circut routes through both, or they run to it. The brakes themselves are new on the rear and fairly new on the front Thanks, Gary

My ABS light and Brake light are on and the Speedo works intermittantly, above 30 miles an hour. What would be the most likely culprit?My ABS light and Brake light are on and the Speedo works intermittantly, above 30 miles an hour. What would be the most likely culprit?

Just went through this problem with my Dakota as well. This is a very very very common problem with the Dodges. First things first. Replace the Vehicle Speed Sensor on the rear differential. Cost around 40 dollars at your local auto parts store or even from the stealership. Its easy to change as well one nut and off comes the bracket then the stud comes off and then you can take out the sensor. They big key is here to be VERY careful pulling out the sensor or you will break it off in the housing. You will need to slowly turn and pry it out with a small screwdriver (as there is an Oring holding it in). Reverse the process to install the new one. After you get the sensor in, reset everything by pulling the negative off the battery and leaving it off for 30 min (some require less time but 30 min is safe) to ensure all is reset. Hope this helps you.

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the ABS and traction light are on due to a failure with the speedometer. I SUSPECT A SEED SENSOR would be the culprit as if speed is not sensed from a wheel (RF / LF /RR / LR) the ABS module with be disabled and would lite the ABS and Brake light. the airbag and heated seats are on separate circuit. the air bag should be diagnosed with a handheld device ( go to advance auto or similar type parts store)n they will read the code.. post the code and I may be able to help ... also ask em to get the ABS / Brake codes a ell

the check engine light is probably related to the abs light. have the car scanned to find out wich sensor is bad. it's probably one of the front wheel speed sensors going bad or the abs module is going bad

I recently had the same problem on my 99 dakota R/T. My symptoms included the abs and brake light staying lit, speedo failing to work at all speeds and the truck would occassionally stall when coming to a stop. I ended up replacing the rear abs speed sensor (on top of the rear diff) and all is well now. The truck runs exactly as it should. You are looking at a $30-$35 dollar part.

The rear wheel speed sensor is the most common problem on those trucks and will do what you are talking about. It is located at the top of the rear axle in the center. It picks up it's signal from a tone ring on the diff inside! If a tranny input or output sensor is bad then the tranny won't shift properly!

Speed sensor located in top of rear diff is probably bad, It sends a signal to abs module for abs, it also is used by pcm and cluster for vehicle speed.Sometimes rear diff mechanical problem can damage the sensor. Trans sensors have nothing to do with speedo or abs light.